loaders.gl/dist/es6/common/smart-fetch.js

Framework-independent loaders for 3D graphics formats

import path from 'path';
export function smartFetch(url, loaders, options) {
  /* global fetch */
  return fetch(url).then(response => response.text()).then(text => smartParse(text, url));
} // Find a loader that works for extension/text

export function smartParse(text, url, loaders, options) {
  const loader = getLoader(url, text, loaders);

  if (!loader.parseText) {
    throw new Error(`${loader.name} loader cannot handle text`);
  }

  return loader.parseText(text, options);
} // Search the loaders array argument for a loader that matches extension or text

function getLoader(url, text, loaders) {
  // Get extension without
  let extension = path.extname(url) || url;

  if (extension.length && extension[0] === '.') {
    extension = extension.substr(1).toLowerCase();
  }

  for (const loader of loaders) {
    if (loader.extension === extension) {
      return loader;
    }
  }

  for (const loader of loaders) {
    if (loader.name.toLowerCase === extension) {
      return loader;
    }
  }

  for (const loader of loaders) {
    if (loader.testText && loader.testText(text)) {
      return loader;
    }
  }

  return null;
}
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